MERO Report

Pamela Marks, Head

Bituminous Section, MERO

Highway Standards Branch

OHMPA Road Show

April, 2014

Outline

Warm Mix Asphalt (WMA)

Stone Mastic Asphalt (SMA)

Asphalt Cement Testing

Payment by Square Metre

Inertial Profiler

GreenPave

Warm Mix Asphalt (WMA)

3

MTO’s WMA contracts have been successful, with 500,000

tonnes paved to date

Compared to HMA, WMA:

Improves compaction and joint quality

Facilitates late season paving

Reduces cracking potential

Reduces fuel consumption

Reduces emissions at asphalt plant and paving site

MTO permits WMA wherever HMA is specified

Additionally, MTO expects to specify use of an estimated

400,000 tonnes of WMA on 2014 contracts to assist

contractors in becoming comfortable with the technology

WMA Task Group is working to update mix design procedures

Stone Mastic Asphalt (SMA)

4

The temporary pause placed on use of SMA

due to concerns with early age friction has been

lifted

New SMA surface courses will require a grit

coated with asphalt cement (1%), embedded on

the surface

SMA trials have proven this to be an effective

method to significantly improve early age

friction

One contract completed in WR, one underway

in CR

Moving forward with additional contracts for

2014

5

Asphalt Cement Testing

6

Collaboration with our stakeholders resulted in leading edge solutions to better characterize asphalt cement for cracking

Test results since 2011, show asphalt cement suppliers are able to meet additional testing criteria inserted on contracts: Multiple Stress Creep Recovery (MSCR) Double Edge Notched Tension Test (DENT) Extended Bending Beam Rheometer (Extended BBR)

and Ash Content

For all completed 2011 trial contracts, performance is being reviewed using 2013 iVision data; have completed collection of available mix designs, ERS data and samples.

East Region expected to invoke ExBBR criteria on 1-2 contracts

iVision – IRI Pavement

Performance Chart

Payment by Square Metre

8

Surface course payment by square metre specification is updated to include binder and surface course

Assessment made at end of paving of all square metre item lifts

Clarification provided for rejectable sub-lots including repair, assessment for penalty and what the penalty would be if left in place instead of repaired.

SP103S52 that provided measurement conversions for Non-Payment References in Contract Documents replaced with a formula to convert from tonnes to square metres within SP313F51

Inertial Profiler

9

Eight consultant and 4 contractor profilers were certified in 2013

2014 inertial profiler correlation to be first week of June in Burlington

On average 3 referee requests per year

California profilograph correlation to be held early May (there is at least one asphalt paving contract requiring the use of this test)

GreenPave

10

Over 90 design projects assessed using MTO

developed simple points-based rating system for

sustainability of pavement design and

construction alternatives

Point awarding system in relation to construction

methods and activities being finalized for:

Actual mass of recycled materials

Pollution reduction due to retrofitted

equipment/ alternative fuels

Sustainable practices / innovations beyond

project requirements

Improvements to conventional processes

GreenPave

GreenPave launch to include information

sessions and on-line availability of

promotional materials - Overview

Presentation, GreenPave Reference Guide

and GreenPave Worksheet

External training strategy using webinar

format under development

Planning to include GreenPave in three

contracts for 2014

11

Concluding Remarks

12

Ministry is also working on variety of other

projects to encourage contractor innovation

Ministry staff are working closely with the

industry to implement these initiatives

This consultation process is working well

Will continue to work closely with OHMPA to

achieve our common goals